Vaillant Ecotec Pro 28 always runs the central heating
Vaillant Ecotec Pro 28 always runs the central heating
Hi, all,
I wonder if anybody can help with a problem that I have on a boiler that's about a decade old but in good condition. Basically, when I switch on the central heating, it will run regardless of the demand signal from the simple Honeywell thermostat that I have attached to terminals/clamps 3-4.
I have done some diagnosis:
- Checked for continuity on the cable that runs through terminals/clamps 3-4 and found that when the thermostat is below room temperature, there is no continuity...
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by ggabriel
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum
Vaillant Ecotec Pro 28 always runs the central heating
Hi, all,
I wonder if anybody can help with a problem that I have on a boiler that's about a decade old but in good condition. Basically, when I switch on the central heating, it will run regardless of the demand signal from the simple Honeywell thermostat that I have attached to terminals/clamps 3-4.
I have done some diagnosis:
- Checked for continuity on the cable that runs through terminals/clamps 3-4 and found that when the thermostat is below room temperature, there is no continuity...
Read more
by ggabriel
This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum